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| import re | |
| def parse_hex(rgb_hex_str: str) -> tuple[float, float, float]: | |
| if not re.match(r"^#[0-9a-fA-F]{6}$", rgb_hex_str): | |
| raise ValueError("Invalid hex color") | |
| return tuple(int(rgb_hex_str[i:i+2], 16) / 255 for i in (1, 3, 5)) | |